Armstrong Installation, Start-up and Operating Instructions Armstrong Differential Condensate Controller

8/12/2019 Armstrong Installation, Start-up and Operating Instructions Armstrong Differential Condensate Controller

1/4

IB-90-A

INSTALLATION, START UP AND OPERATING INSTRUCTIONS

Armstrong Differential Condensate Controller

This bulletin should be used by experienced personnel as a guide to the installation, start-up, andoperation of Differential Condensate Controllers. Selection or installation of equipment should

always be accompanied by competent technical assistance. We encourage you to contact Armstrongor its local representative if further information is required.

These instructions primarily cover the Condensate Controllers installed with the secondary steambeing discharged back into the condensate return piping (See Figure 1 below). If the secondary steamdischarge from the Controller is into a separate pipe header for re-use in other condensing units, themanual metering valve setting D may differ, depending upon the pressure of the secondary steamheader.

MeteringValve(As Supplied)

For General Description of Differential Condensate Con-trollers and their operation -- See Bulletin No. 126.

INSTALLATION RECOMMENDATIONS

Locate Controller below equipment being drainedwhen possible.

Full pipe size connections should be used to Con-troller inlet, outlet and secondary steam dis-charge.

Provide hand valves E and B as shown inFigure 1. These not only provide proper isolationfor repair but are necessary when adjusting op-eration of Controller during initial start-up. (SeeStart-Up Procedure).

Provide a test valve hook-up C in Figure 1).See Figures 2 8z 3 for connection sizes and loca-tions on the DC Controllers.


2/4

bsea Differential Condensate Controller

5

2.

3.

The manual metering valve Din Figure l , as supplied with the DC Controller, can berelocated to a horizontal position if necessary to reduce overall vertical installation height.

START-UP OPERATING PROCEDURE

The following valve settings should be made on initial start-up of equipment. (Refer to

Figure 1).

Valves A, B and E openb) Valves C and closed

With these valve settings, the Differential Controller is functioning as a standard invertedbucket steam trap. Continue to operate in this condition until system has reached operatingconditions of pressure and temperature.

Close valve B on the condensate discharge of controller and open test valve C. Conden-

sate being discharged through the Controller is now observed at test valve piping to atmos-phere.

Note the cycle rate of condensate discharge. (This would be typical of the operation of astandard inverted bucket trap.)

Important: If the condensate discharge is continuous, never cycling, the Differential Con-

troller selected may be too small for the required load.

Open manual metering valve D l/4 turn from the full closed position.Observe the condensate discharge cycle rate. A definite increase in the cycle rate should occur

over that observed in Step 2 above.

If no increase in cycle rate is observed with this setting, open the manual metering valve anadditional l/4 turn and again observe the discharge cycle rate. (Allow three or four minutes

between changes for stabilizing effect.)

Continue this procedure until a definite increase in the condensate cycle rate is accomplished.(The normal adjustment setting for the manual metering valve will usually be from l/4 to 1full turn open.)

NOTE: If the secondary steam from the Controller is discharging into a separate header, therequired setting of the manual metering valve may exceed 1 full turn open under lowdifferential pressure AP. conditions. Test as described above for correct setting.


3/4

Differential Condensate Controller

4. Leave the manual metering valve set in the position as determined previously.

Open valve B and close test valve C.

The Differential Condensate Controller should now be functioning normally with the manual me-tering valve and secondary steam flow at the correct setting to provide the highest heat transfer ef-ficiency.

Once the Differential Condensate Controller is set, the manual metering valve setting should notbe changed. The handle of the valve should be locked in place to prevent valve tampering by un-

authorized personnel.

Should the manual metering valve be closed to isolate the Controller during repairs, record itsopening position and return to same when putting Controller back in operation.

FIGURE 2

80 DC SERIES

Test Valve

Manual

Metering

Valve

det ndarySteam

Outlet

ZCJ-DC SERIES AND 32 THRU 36 38 DC SERIESDC SERIES

lest Valve

Test Valve

Secondary

Steam

Outlet

Outlet

Test Valve Piping

Finlet

Manual

Metering

Valve

Secondary

Steam

Outlet


4/4

Differential Condensate Controller

FIGURE 3 TEST VALVE PIPING SIZE

8 DCSERIES81-DC l/482-DC l/283-DC 484-DC 1

2 DCSERIES21-DC l/822-DC 31823-DC l/224-DC l DC 426-DC 1

32 THRU 36

DC SERIES

32-DC l/233-DC l/234-DC l/235DC 31436-DC 1II

3 DC SERIES

38-DC l-1/2

ARMSTRONG MACHINE WORKS \ 816 Maple Street \ Three Rivers, MI 49093 \ (616) 273-1415

I B-90-A Q 9 ML Printed in U.S.A.

Documents

Armstrong Installation, Start-up and Operating Instructions Armstrong Differential Condensate Controller